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1JOSHUA STEVENS, or cuiooPEE --EALLS7 MASSACHUSETTS. Letters Patent No.61,578, dated January 29,1867;` anteziatet January 1.9, 1867.

IMPROVED SASH 'IAASTBNERL TO ALL WHOM IT MAY CONGERN:

Be it known that I, JOSHUA STEVENS, of Chicopee Falls, county ofHampden, and State of Massachusetts, have invented a new and usefulImprovement in Window-Sash Fasteners; and I do hereby declare thefollowing to be a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, making a\k part of thisspecification, and the letters of reference marked thereon, in which-Figure 1 is a plan view of the fastener.

Figure 2 is a perspective view-of the finger or pawl.

Figure 3 is a perspective view of the cam lever.

Figure 4 is a longitudinal elevation.

Figure4 5 is axview of the cam'with the lever out olf.

Figure 6 is a transverse section through line A B of iig. 7.

Figure 7 is a back elevation of the cylinder, plate, spindle, andcrank', .or arrangement for spiral*v spring.

The nature of my invention consists in making a fastener, or cam andcatch, which shall so operate that when-the window is raised it shallfirmly hold the window at whatever pointit is desired, without the aidof weights or any other of the usual window appliances; and when thewindow is down it shall firmly hold and securely fasten the window sothat it cannot be opened from the outside. v y

To enable others skilled in the art to make rand use my invention, Iwill proceed'to describe itsiccnstruction and'operation. i y:

`In the drawings, a is the sash-platewhieh is provided-with theprojection a', en one side of which is attached the cam-lever I1, andalso a nger orpawl, a, one cnd'of which reaches through the plate a intoa notch made in the window frame for the purpose of holding the sash inposition when down.V The other end c of the finger or pawl passes into anotch, b', made in the upper end of the cam-lever b, in such manner thatby rais ing. the handle of the cam-lever b it, shall turn the finger orpawl c on its pivot andrelease it from its notch in the window frame, soas to allow the sash to be raised. When the sash is raised, the handleof the cam-lever b is lowered or dropped, and its weight carries thecam-shaped part e of the lever b into contact with' the Window frame;and the lower part of the cam-shaped part e being further from its pivotthan the` upper part, theweight of the sash causes the cam-shaped part eto bind for pinch against the window frame, thereby holding the sash atwhatever point it is desired. The handle of the cam-lever may he cut offjust back ofthe notch, and for its weight a spiral spring, cylinder,spindle, and crank may be substituted. f is a plate which is fastened tothe inside of the sash, and to the back'of the plate j .is fastened thecylinder z', inside of which, and around tho spindle g, is wound aspiral spring, j, one end of which is fastened to the spindle g, eitherby passing-one end of the spring intoa'small hole drilled 4in thespindle'for that purpose, or by any other suitable means, and the otherend may be fastened by passing through a hole in the cylinder,as shownat j. That part of the spindle g is made round to iit the hole l in theplatte a', and that part of the spindle g, as shown at L, is made squareto fit the hole m in the cam b, g. 5. The cylinder is passed through ahole made for it 'in the sash, and the round part g inserted into thehole Z in the plate a', and thesquare part h-of 'the spindleg insertedinto the hole m of the cam b, and the plate f is then turned aroundso asto windv up or t-ighten the spiral spring, and securely fastened to thesash. When this is done the tendency ofv the spring to unwind keeps thecam b iirmly pressed against the window frame, and thus holds the sashat any desired elevation,-as before. The sash may be low- 'ered bymoving the handle k of the spindle q slightly to one side. l i Y In thisnew article of manufacture I can produce a sash fastener which issubstantial, not liable to gct out of order, as it is simple in itsconstruction; which can he manufactured at much cheaper ratethan many ofthe sash fasteners now in commerce, and is perfectly secure, both infastening the sash when down and in holding the sash when up.

Having thus described my invention,'what I claim as a new article ofmanufacture, and desire to secure by Letters Patent, is-

The cam b, ngcr or pawl c, and plate a, whether operated by a lever or acrank, all combined and arranged substantially as described. JOSHUASTEVENS.

Witnesses:

Tunononn A. CURTIS,vr YARNUM N. TAYLOR.

